trains is a list that contains information about trains associated with a station stn. Specifically, each element in this list is a pair: [Arrival, Departure]. If the arrival or departure time is empty, it is represented as "None". 1 flag1 = False, flag2 = True 2 count = 0 3 foreach x in trains{ 4 if(first(x) == "None" or last(x) == "None"){ 5 flag1 = True 6 } 7 else{ 8 count = count + 1 9 } 10 } 11 if(count == length(trains)){ 12 flag2 = False 13 } Based on the above data, answer the given subquestions. At the end of execution of the code given, what can be said about the values stored by the Boolean variables flag1 and flag2?

(A) flag1 and flag2 always store the same value

(B) flag1 and flag2 always store opposite values

(C) flag1 always stores the value True

(D) flag2 always stores the value True

Computational Thinking · End Term · 30 Apr 2023 · January 2023 term · Set QPF1-S2

Question 20: trains is a list that contains information about trains …

Question 20

+4 marksOne correct option

trains is a list that contains information about trains associated with a station stn. Specifically, each element in this list is a pair: [Arrival, Departure]. If the arrival or departure time is empty, it is represented as "None".

text

1 1  flag1 = False, flag2 = True
2 2  count = 0
3 3  foreach x in trains{
4 4      if(first(x) == "None" or last(x) == "None"){
5 5          flag1 = True
6 6      }
7 7      else{
8 8          count = count + 1
9 9      }
1010  }
1111  if(count == length(trains)){
1212      flag2 = False
1313  }

Based on the above data, answer the given subquestions.

At the end of execution of the code given, what can be said about the values stored by the Boolean variables flag1 and flag2?

A
flag1 and flag2 always store the same value
B
flag1 and flag2 always store opposite values
C
flag1 always stores the value True
D
flag2 always stores the value True

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Correct answer

A
flag1 and flag2 always store the same value

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Question 20 of 25 in the IIT Madras BS Computational Thinking (Computational Thinking (CT)) End Term paper sat on 30 Apr 2023, in the January 2023 term (IIT M FOUNDATION ET1 EXAM QPF1 S2 30 Apr 2023). It carries 4 marks.

Question 20: trains is a list that contains information about trains …

Question 20

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